Woofer pumping WHY??


Hello All, I have an older REL B2 series. I love this sub. I recently received a new Project Xtension 10 with Clear Audio Maestro Ebony v2. After a couple days I noticed bad woofer pumping on several records I like to listen too. When I brought it up to Needle Doctor they told me it was my records and said it worked fine in there store. Now my REL is blown! I am so upset at myself for not taking this matter more seriously. Now I am purchasing a KAB rumble filter because I am not going through this again. Is this a cartridge mismatch?? Because on my REGA with Dynavector 10X5 It did not do this woofer pumping nearly as bad. AND I do remember putting a DENON DL103 on my RB301 and this same woofer crazy action occurred!! Immediately took it off that arm. I just spent $4100 for this Xtension10/CA Maestro and now I am scratching my head. Hmmmm.
128x128mattmiller
Ok now I am saying that its not a bad cartridge arm match because I am getting amazing sound from the main speakers. But I still have this rumble problem and the only way I know to get rid of it is to buy a rumble filter. Anyone have a highend turntable and experience bad cone movements?? I think these excessive cone movements might have damaged my REL'S voice coil?? Because now its making scraping sounds and I had to move it out of the system :-(
Did you check the arm cart combo for resonant frequency? There are on line calculators if u know the cart compliance and arm effective mass. At least I think it's effective mass.
The phono stage needs to roll off below 20Hz. Otherwise you're playing with fire, as you've observed. Some phono stages do, and others don't...but it's stupid not to.